The lion bridge connects the Kazan and Spassky islands through the Griboedov channel. The bridge was opened in 1725 and was originally called "The Bridge of Four Lions" or "The Bridge of Four Lions" because of the decorative sculptures installed on it. As in the case of other pedestrian chain bridges, these sculptures conceal the cast-iron parts of the bridge's supports connected by metal chains that stretch out of the open lions' mouths. Designed such a design engineer G. Tretter and the creator of cast-iron lions sculptor P. P. Sokolov. Lion Bridge survived several restorations. The last restoration of the Lion Bridge took place shortly before the celebration of the 300th anniversary of St. Petersburg. The bridge tried to completely restore its historical appearance, to recreate even the smallest, minor ones did.